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Microchip Technology 24LC024/ST
- Part No.:
- 24LC024/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC024/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,398
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Product details
Overview
24LC024/ST from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory with hardware write-protection (WP pin), 16-byte page write buffer, and operation from 2.5V to 5.5V. It supports 400 kHz clock rate (100 kHz below 2.5V), delivers typical standby current of 1 μA, and features Schmitt-trigger inputs for noise immunity. It is used in industrial sensor calibration storage and embedded system configuration retention.
For engineers reviewing the 24LC024/ST datasheet, 24LC024/ST pinout, 24LC024/ST application, or 24LC024/ST equivalent, key selection criteria include VCC range compatibility (2.5–5.5V), WP-enabled hardware protection, 8-pin SOIC/TSSOP/DFN package options, and automotive-grade (-40°C to +125°C) availability for mission-critical systems.
Technical Context
The 24LC024/ST implements a standard two-wire I²C interface with open-drain SDA/SCL pins, internal address pointer auto-increment, and cascading support for up to eight devices via A0–A2 address pins. Its write-protect circuitry disables all array writes when WP is tied to VCC.
It uses low-power CMOS technology with self-timed erase/write cycles, 5 ms maximum page write time, and integrated noise suppression via Schmitt-trigger inputs and output slope control-eliminating ground bounce and enabling reliable operation on electrically noisy PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit), sufficient for firmware flags, calibration coefficients, or device ID storage |
| VCC operating range | 2.5V to 5.5V - compatible with 3.3V and 5V logic systems without level shifting |
| Max clock frequency | 400 kHz (100 kHz if VCC < 2.5V) - enables fast configuration reads in real-time systems |
| Page write buffer | 16 bytes - reduces I²C transaction count for multi-byte updates, improving bus efficiency |
| Write endurance | 1 million erase/write cycles - supports frequent field updates in telemetry or logging applications |
| Data retention | 200 years at +25°C - ensures long-term reliability in unattended or maintenance-free deployments |
| Temperature grade | Industrial (-40°C to +85°C) and Automotive (-40°C to +125°C) - validated for under-hood and factory-floor environments |
Pinout & Package
24LC024/ST is available in 8-pin SOIC (3.90 mm), TSSOP, PDIP, DFN, TDFN, and MSOP packages. Pin functions are consistent across all 8-pin variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip select input | LSB of 3-bit slave address; enables up to eight devices on same I²C bus |
| A1 | Chip select input | Middle bit of slave address; must be hardwired to VSS or VCC for device selection |
| A2 | Chip select input | MSB of slave address; determines unique I²C address within multi-device topology |
| VSS | Ground reference | Return path for all internal circuits; requires low-impedance connection to system GND plane |
| SDA | Serial data I/O | Open-drain bidirectional line; requires external pull-up resistor (2 kΩ for 400 kHz) |
| SCL | Serial clock input | Master-generated clock; synchronizes all read/write transfers and timing-sensitive operations |
| WP | Hardware write-protect | Active-high enable: tie to VCC to lock entire memory array against accidental writes |
| VCC | Power supply | Primary supply rail; internal voltage detector disables writes below ~1.5V to prevent corruption |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write-protection | WP pin physically disables all write operations when asserted - eliminates software bugs or bus glitches from corrupting critical data |
| 16-byte page write buffer | Reduces required I²C transactions by up to 16× versus byte-write mode - lowers CPU overhead and bus contention |
| Schmitt-trigger inputs | Provides 0.05 VCC hysteresis on SDA/SCL - rejects sub-50 ns noise spikes common in motor-driven or switching-power environments |
| Self-timed write cycle | 5 ms maximum duration with automatic completion detection - simplifies firmware timing and enables ACK polling for optimal throughput |
| ESD protection | ≥4 kV HBM on all pins - meets industrial handling requirements without additional external protection components |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends in factory automation PLCs. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-up or recalibration routines via I²C. Use Value: Enables field-replaceable sensors without reprogramming host MCU; WP pin prevents runtime corruption during EMI events. |
Use Scenario: Holding boot parameters, network settings, and user preferences in networked HVAC controllers. IC Role / Device Role / Timing Role: Persistent parameter store updated infrequently but read at every system reset. Use Value: 200-year data retention ensures settings survive decades of operation; 1 μA standby current extends battery backup life. |
| Automotive Body Control Module | Medical Device Usage Log |
Use Scenario: Recording door lock actuation history and mirror position presets in automotive BCMs operating at -40°C to +125°C. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfacing directly with 5V microcontroller I²C peripheral. Use Value: E-grade qualification guarantees functionality over full vehicle lifetime; hardware WP prevents unintended writes during load-dump transients. |
Use Scenario: Logging sterilization cycles, usage counts, and fault events in portable diagnostic equipment requiring regulatory traceability. IC Role / Device Role / Timing Role: Tamper-resistant audit trail storage with deterministic write timing for FDA-compliant data integrity. Use Value: 1M endurance supports >10 years of daily logging; page write capability ensures atomic multi-field updates without partial writes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA024-I/P | Wider VCC range (1.7–5.5V); identical pinout, memory map, and WP function | Better suited for battery-powered or mixed-voltage systems where supply may dip below 2.5V | Select 24AA024-I/P only if operation below 2.5V is required; otherwise 24LC024/ST offers tighter automotive temp support |
| AT24C02-PU | No hardware WP pin; relies on software write protection; same 2Kbit capacity and I²C interface | Lacks physical write-lock - unsuitable for safety-critical or high-EMI environments where bus glitches could trigger writes | Choose AT24C02-PU only in cost-sensitive, low-risk consumer applications without stringent data integrity requirements |
Compared with 24AA024-I/P and AT24C02-PU, the 24LC024/ST uniquely combines automotive-grade temperature operation, hardware write-protection, and guaranteed 400 kHz performance at 2.5V+, making it optimal for industrial and transportation systems demanding robustness and deterministic behavior.
Availability
24LC024/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and medical device usage logging requiring stable component supply across extended product lifecycles.
Supply support for 24LC024/ST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.
The 24LC024/ST belongs to Microchip's legacy serial EEPROM product line, engineered specifically for reliable, low-power, nonvolatile data storage in harsh industrial and automotive environments where data integrity and long-term retention are critical.
FAQ
What is the minimum VCC voltage required for reliable operation of the 24LC024/ST?
The 24LC024/ST requires a minimum VCC of 2.5V for guaranteed operation across its full specification range, including 400 kHz I²C communication and hardware write-protection functionality. Below 2.5V, clock speed is limited to 100 kHz, and internal voltage detection may disable writes to prevent data corruption - this behavior is documented in DS21210N, Section 2.5.
Does the 24LC024/ST support page write operations, and what is the maximum buffer size?
Yes, the 24LC024/ST supports page write operations with a fixed 16-byte buffer. This allows up to 16 sequential bytes to be loaded into the internal latch before initiating the self-timed 5 ms write cycle. Crossing physical page boundaries (every 16 addresses) causes wraparound - software must manage alignment to avoid unintended overwrites, as specified in Section 6.2 of DS21210N.
How does the WP pin function on the 24LC024/ST, and what happens when it is asserted?
On the 24LC024/ST, the WP pin is an active-high hardware write-protect input. When tied to VCC, it disables all write operations (byte and page) to the entire 2 Kbit memory array, though the device still acknowledges I²C commands. Writes remain blocked until WP is returned to VSS - this feature is confirmed in Section 2.4 and Figure 6-1 of DS21210N.
Which packages are available for the 24LC024/ST, and are pinouts identical across them?
The 24LC024/ST is offered in 8-pin PDIP, SOIC (3.90 mm), TSSOP, DFN, TDFN, and MSOP packages. All share identical pin numbering and function mapping per Section 2.1–2.4 of DS21210N. The SOT-23 variant is exclusive to 24XX025 parts and is not available for 24LC024/ST.
What is the endurance rating and data retention specification for the 24LC024/ST?
The 24LC024/ST is rated for more than 1 million erase/write cycles and guarantees data retention exceeding 200 years at +25°C. These values are characterized per Microchip's Total Endurance™ model and verified through accelerated testing - both specifications appear in the Features section and Table 1-2 of DS21210N.
24LC024/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC024/ST FAQ
1.How can I place an order for 24LC024/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC024/ST on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 24LC024/ST reliable?
The price and inventory of 24LC024/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC024/ST is usually 5 days.
3.What payment methods are accepted for 24LC024/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC024/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC024/ST?
24LC024/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC024/ST order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 24LC024/ST?
For technical support, including 24LC024/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC024/ST requirements.
6.How does Aetrix verify that 24LC024/ST is sourced from the original manufacturer or authorized distributors?
All 24LC024/ST products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 24LC024/ST meets industry standards.
7.What is the process for return or replacement of 24LC024/ST?
All 24LC024/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC024/ST, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 24LC024/ST part is unused and in its original packaging.
Return procedure for 24LC024/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC024/ST Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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